US3835595A - Apparatus for adjusting the position of a front cover for a grinding wheel guard - Google Patents

Apparatus for adjusting the position of a front cover for a grinding wheel guard Download PDF

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Publication number
US3835595A
US3835595A US00267080A US26708072A US3835595A US 3835595 A US3835595 A US 3835595A US 00267080 A US00267080 A US 00267080A US 26708072 A US26708072 A US 26708072A US 3835595 A US3835595 A US 3835595A
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United States
Prior art keywords
front cover
grinding wheel
revolving
handle
adjusting screw
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US00267080A
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English (en)
Inventor
S Oshima
H Takahashi
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Toyoda Koki KK
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Toyoda Koki KK
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Publication date
Application filed by Toyoda Koki KK filed Critical Toyoda Koki KK
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Publication of US3835595A publication Critical patent/US3835595A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/04—Protective covers for the grinding wheel

Definitions

  • An apparatus for adjusting the position of a front cover for a grinding wheel guard comprises the front cover being pivotally mounted by a hinged pin at the front upper part of the grinding wheel guard, a first revolving member being secured to the front cover with its axis in parallel relation with the hinged pin, a second revolving member being secured to the grinding wheel guard with its axis in parallel relation to the hinged pin, and an adjusting screw having a flange biased against one of the first and second revolving members and being connected to the other of the first and second revolving members and to a handle.
  • the first revolving member is connected to the front cover for limited relative rotation with respect thereto by a pin and slot arrangement, whereby upon movement of the first revolving member in the axial direction of the adjusting screw, the front cover is turned either in a clockwise or counterclockwise direction.
  • This invention relates to grinding wheel guards and more particularly to an apparatus for adjusting the position of a front cover for a grinding wheel guard according to any decrease occurring in the diameter of the grinding wheel.
  • front covers of grinding wheel guards are usually pivotally mounted to the upper edge of the grinding wheel guard, and are generally frictionally clamped directly to the grinding wheel guard by bolts or similar clamping devices. Accordingly, when the diameter of a grinding wheel is decreased through wear accompanying use, the bolts must be loosened with an appropriate tool, such as a spanner, whereupon the gap between the front cover and the grinding wheel may be adjusted, while manually holding the front cover, so as not to permit contact between the front cover and the rotating grinding wheel through rotary movement of the front cover being caused by the dead weight thereof, and then the bolts are again clamped to fix the front cover to the grinding wheel guard in its adjusted position.
  • the adjustment of grinding wheel guard front covers has therefore been a troublesome procedure in the past.
  • Another object of the presnet invention is to provide an improved apparatus for adjusting the position of a front cover for a grinding wheel guard which is simple to operate, yet provides safety to the operator even from flying pieces of a broken grinding wheel.
  • an apparatus constructed according to the present invention so as to permit adjusting the front cover of a grinding wheel guard merely by screwing an adjusting screw provided between first and second revolving means which are respectively pivotally mounted to the front cover and to the grinding wheel guard, whereby the adjustment of the position of the front cover is easily and safely given to completely prevent the opening of the front cover by broken pieces of the grinding wheel when the grinding wheel is broken.
  • FIG. 1 is a front view, partly in cross-section, of an apparatus for adjusting the position of a frontcover of a grinding wheel guard constructed according to this invention:
  • FIG. 2 is a partial enlarged sectional view taken along the line II-II in FIG. l;
  • FIG. 3 is a partial enlarged sectional view taken along the line IlIIII in FIG. I;
  • FIG. 4 is a partial enlarged sectional view taken along the line lV-IV in FIG. 1.
  • a grinding wheel guard 2 is mounted on a grinder base, not shown, so as to cover the upper and lower parts, the rear part and one side part of a grinding wheel 1.
  • a side cover 3 is provided on the grinding wheel guard 2 so as to cover the other side part of the grinding wheel 1.
  • a front cover 4 for the grinding wheel guard is pivotally mounted through a hinged pin 5 to the upper front part of the grinding wheel guard 2 so as to cover the front part of the grinding wheel 1.
  • a holder 7 is fixed to a side face of the front cover 4 and a first revolving member 6 is axially held by the holder 7 in parallel relation to the hinged pin 5.
  • a holder 9 is fixed to the side cover 3 of the grinding wheel guard and a second revolving member 8 is axially held thereto also in parallel relation to the hinged pin 5.
  • One end of an elongate adjusting screw 10 is screwed to the second revolving member 8 passing through and crossing the axis of rotation of the second revolving member.
  • a flange 10a is formed on the center of the adjusting screw 10 and the other end is fitted into the hollow center of a handle shaft 11 so as to be axially slidable therein.
  • a spring 12 is compressed in the hollow center of the handle shaft between the handle shaft 11 and the end of the adjusting screw 10 and a pin 13 projecting radially from the end of the adjusting screw 10 disposed in the handle shaft 11 is connected to an elongate longitudinally extending hole 11b provided in the peripheral wall of the handle shaft 11, as shown in FIG. 2, so as to transmit the rotation of the handle shaft 11 to the adjusting screw 10.
  • the handle shaft and adjusting screw are relatively axially movable, they are non-rotatably movable with respect to each other about their common axis.
  • the first revolving member 6 has a first groove 60 having a pair of faced planes arranged in parallel relation to the hinged pin 5 and a pair of second grooves 6a and 6b perpendicular to the faced planes of the first groove 60.
  • the holder 7 has grooves 7a and 7b arranged in the same direction as the second grooves 6a and 6b of the first revolving means 6.
  • the adjusting screw 10 and the handle shaft 11 are respectively inserted in the second grooves 6a and 6b and in the grooves 7a and 7b of the holder 7, with the flange 10a of the adjusting screw 10 being pressed against one side wall of the first groove 60 of the first revolving member 6, and the flange 110 of the handle shaft 11 being pressed against a recess 6d formed in the other side wall of the first groove 6c by the biasing force of the spring 12, which urges the handle shaft 11 and the adjusting screw 10 in opposite directions.
  • the bottom of the first revolving member 6 has an arcuate hole 62 through which is fitted a pin 17 projecting from the holder 7 to limit the range of turning of the first revolving member 6.
  • a stopper 18 for the first revolving member 6 is fixed to the holder 7 and a stopper 19 for the second revolving member 8 is fixed to the holder 9.
  • a coolant nozzle 20 is mounted on the front cover 4 by a support 21.
  • the operation of the apparatus being constructed as described herein according to the principle of this invention is described as follows:
  • the adjusting screw 10 moves axially in the direction for approaching the second revolving member 8 so that the first revolving member 6 also moves in the same direction toward the second revolving member 8 through the action of flange 10a against the one faced plane of groove 60, and thereby the front cover 4 is caused to turn in the clockwise direction around the center of the hinged pin 5, as seen in FIG. 1, through the connection of pin 17 on the cover with the arcuate groove 6e of the first revolving means 6.
  • the adjusting screw 10 when the adjusting screw 10 is turned in the counterclockwise direction through manipulation of the handle 14, the adjusting screw 10 moves axially in a direction to depart from the second revolving member 8 so that the handle shaft 11 is also moved away from the second revolving member 8 through the biasing force of spring 12, and the first revolving member 6 also moves away from the second revolving member 8 through the action of flange 110 against the other faced plane of groove 6c, whereby the front cover 4 is turned in the counterclockwise direction around the center of the hinged pin 5.
  • the position of the front cover 4 can be adjusted according to the diameter of the grinding wheel 1 by merely turning the handle 14.
  • the handle shaft 11 When the grinding wheel 1 is exchanged, the handle shaft 11 is moved against the spring action by the bandle 14, so as to detach the flange 11c of the handle shaft 11 from the recess 6d and the handle shaft 11 and the adjusting screw 10 are turned about the center of the second revolving member 8, so that they are detached from the second grooves 6a and 6b of the first revolving member 6 and the grooves 7a and 7b of the holder 7, and are moved to the position shown in dotted line in FIG. 1.
  • the front cover 4 is turned to the upper right direction as viewed in FIG. 1, and the side cover of the grinding wheel guard is opened to permit the grinding wheel 1 to be exchanged.
  • the first and second revolving members are respectively fitted to the front cover pivotally mounted on the grinding wheel guard and to the grinding wheel guard, and the adjusting screw is provided between the first and second revolving members.
  • the front cover is thus connected to the grinding wheel guard through the adjusting screw, whereby the front cover can be adjusted to the position corresponding to the diameter of the grinding wheel by turning the same by turning the adjusting screw through manipulation of the handle 14 fixed to the adjusting screw.
  • this invention is also quite advantageous because the operation of loosening and fixing the bolts by a tool such as a spanner is not required. and also the operation of holding the front cover by hand so as not to permit contact of the front cover with the rotating grinding wheel by the rotary movement of the front cover caused by the dead weight thereof is not required when the position of the front cover is to be adjusted.
  • An apparatus for adjusting the position of a front cover for a grinding wheel guard being pivotally mounted by a hinged pin to the front upper part of the grinding wheel guard, comprising:
  • first revolving means on the front cover being held for relative movement about an axis parallel to the hinged pin:
  • an adjusting screw having a first flange means faced against one of said first and second revolving means and being connected to the other of said first and second revolving means and to a handle for causing pivotal movement of said front cover about said hinged pin;
  • said handle including second flange means faced against one of said first and second revolving means, wherein said first and second flange means transmit motion from said screw and said handle to said one of said first and second revolving means for pivoting said cover relative to said guard;
  • said first revolving means has an arcuate hole which receives a pin projecting from a holder thereof secured to the front cover to limit the range of turning of said first revolving means.
  • An apparatus for adjusting the position of a front cover for a grinding wheel guard being pivotally mounted by a hinged pin to the front upper part of the grinding wheel guard comprising:
  • ad usting screw and connected to an elongate an adjusting screw having a flange faced against one hole m the handle shflft whereby g l of the of said first nd se d r v lvi means d to a handle shaft 15 transmitted to the ad usting screw.
  • handle for causing pivotal movement of said front of said handle and the adjusting screw for biasing

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
US00267080A 1971-07-29 1972-06-28 Apparatus for adjusting the position of a front cover for a grinding wheel guard Expired - Lifetime US3835595A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP46056903A JPS5040276B1 (enrdf_load_stackoverflow) 1971-07-29 1971-07-29

Publications (1)

Publication Number Publication Date
US3835595A true US3835595A (en) 1974-09-17

Family

ID=13040396

Family Applications (1)

Application Number Title Priority Date Filing Date
US00267080A Expired - Lifetime US3835595A (en) 1971-07-29 1972-06-28 Apparatus for adjusting the position of a front cover for a grinding wheel guard

Country Status (3)

Country Link
US (1) US3835595A (enrdf_load_stackoverflow)
JP (1) JPS5040276B1 (enrdf_load_stackoverflow)
FR (1) FR2147587A5 (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4024674A (en) * 1975-01-22 1977-05-24 Toyoda Koki Kabushiki Kaisha Guard device for a grinding wheel in a grinding machine
US4060942A (en) * 1976-04-26 1977-12-06 Cincinnati Milacron, Inc. Hood adjusting apparatus
US4208844A (en) * 1978-02-27 1980-06-24 Toyoda Koki Kabushiki Kaisha Guard device with dressing apparatus for grinding wheel
US4314425A (en) * 1980-07-10 1982-02-09 Litton Industrial Products, Inc. Coolant assembly for a cylindrical grinding machine
US4365446A (en) * 1980-01-24 1982-12-28 Toyoda Koki Kabushiki Kaisha Guard device for a grinding wheel in a grinding machine
USD456234S1 (en) 2000-06-30 2002-04-30 Porter-Cable Corporation Knurled collar attachment system
USD456685S1 (en) 2000-06-30 2002-05-07 Porter-Cable Corporation Knurled collar guard
USD458825S1 (en) 2000-06-30 2002-06-18 Porter-Cable Corporation Tuck-pointing system
US6464573B1 (en) 2000-06-30 2002-10-15 Porter-Cable Corporation Guard attachment system with knurled clamp ring

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53124658U (enrdf_load_stackoverflow) * 1977-03-12 1978-10-04
JPS53153872U (enrdf_load_stackoverflow) * 1977-05-09 1978-12-04

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE186614C (enrdf_load_stackoverflow) * 1905-05-17
DE191765C (enrdf_load_stackoverflow) * 1900-01-01
GB190326092A (en) * 1903-11-30 1904-10-06 Miles Wadsworth Improved, Adjustable, Safety Guard for Emery Wheels and the like
US952186A (en) * 1907-03-21 1910-03-15 Gabriel Francois Courtois Polishing means.
US2033134A (en) * 1935-05-13 1936-03-10 Landon P Smith Inc Tool
US3423883A (en) * 1965-03-22 1969-01-28 Mso Maschinen & Schleifmittelwerke Ag Safety device for controlling the circumferential speed of grinding wheels
US3526998A (en) * 1969-06-24 1970-09-08 Norton Co Grinding wheel guard for abrading machines

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE191765C (enrdf_load_stackoverflow) * 1900-01-01
GB190326092A (en) * 1903-11-30 1904-10-06 Miles Wadsworth Improved, Adjustable, Safety Guard for Emery Wheels and the like
DE186614C (enrdf_load_stackoverflow) * 1905-05-17
US952186A (en) * 1907-03-21 1910-03-15 Gabriel Francois Courtois Polishing means.
US2033134A (en) * 1935-05-13 1936-03-10 Landon P Smith Inc Tool
US3423883A (en) * 1965-03-22 1969-01-28 Mso Maschinen & Schleifmittelwerke Ag Safety device for controlling the circumferential speed of grinding wheels
US3526998A (en) * 1969-06-24 1970-09-08 Norton Co Grinding wheel guard for abrading machines

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4024674A (en) * 1975-01-22 1977-05-24 Toyoda Koki Kabushiki Kaisha Guard device for a grinding wheel in a grinding machine
US4060942A (en) * 1976-04-26 1977-12-06 Cincinnati Milacron, Inc. Hood adjusting apparatus
US4208844A (en) * 1978-02-27 1980-06-24 Toyoda Koki Kabushiki Kaisha Guard device with dressing apparatus for grinding wheel
US4365446A (en) * 1980-01-24 1982-12-28 Toyoda Koki Kabushiki Kaisha Guard device for a grinding wheel in a grinding machine
US4314425A (en) * 1980-07-10 1982-02-09 Litton Industrial Products, Inc. Coolant assembly for a cylindrical grinding machine
USD456234S1 (en) 2000-06-30 2002-04-30 Porter-Cable Corporation Knurled collar attachment system
USD456685S1 (en) 2000-06-30 2002-05-07 Porter-Cable Corporation Knurled collar guard
USD458825S1 (en) 2000-06-30 2002-06-18 Porter-Cable Corporation Tuck-pointing system
US6464573B1 (en) 2000-06-30 2002-10-15 Porter-Cable Corporation Guard attachment system with knurled clamp ring

Also Published As

Publication number Publication date
JPS5040276B1 (enrdf_load_stackoverflow) 1975-12-23
DE2235378A1 (de) 1973-02-08
FR2147587A5 (enrdf_load_stackoverflow) 1973-03-09
DE2235378B2 (de) 1975-09-11

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